My mail server is running exchange 2003 enterprise. several times each week (and completely randomly) IMAP just stops responding. So far the only thing that seems to fix the problem is a reboot.
When I run Microsofts Port Query tool I receive the following results during an outage:
TCP port 143 (imap service): Listening
Data returned from port:
BYE Connection refused
Does anyone know how to fix this once and for all?